In an insulator, the forbidden energy gap between the valence band and conduction band is of the order of

Options

A. `3eV lt E_(g) lt 6eV`
B. `E_(g) gt 6eV`
C. `E_(g) lt 3eV`
D. `E_(g) = 0eV`

Answer

B

Explanation

In insulators, the forbidden energy gap is quite large. For example, the forbidden energy gap for diamond is 6 eV, which means that minimum of 6 eV energy is required to make the electron jump from the completely filled valence band to conduction band.